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Digital technology that sounds perfect

Alpine's X-Power MRX-M240 mono amplifier uses the latest amp technology to play your music loud and clean without taking up much space. And this amp employs some of the same circuitry developed for Alpine's top-of-the-line PDX digital amps, so it'll bring exceptional sound to almost any ride.

Massive power for high-level systems

The MRX-M240 puts out up to an astonishing 2,400 watts RMS to your subwoofer system, perfect for competitors and true bassheads. And it'll operate safely with a 1-ohm load, making it useful in a variety of sub system installations. Onboard low-pass and subsonic filters let you get the best sound out of your setup, while a parametric bass boost helps to fatten up the sound at exactly the right notes, if you need it.

Looks cool too

A power management system optimizes the amp's performance and keeps the music playing, even when you're pushing it hot and hard for a long time. Speaker-level inputs with an automatic turn-on feature simplify system hook-up.

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Product Research

Features

MRX Amplifier Design: Class-D amplifiers boast higher
efficiency, produce less heat, and draw less current than traditional
Class-AB amps. The MRX series benefits from the technology trickledown
from Alpine's more expensive PDX amps, including Direct FET final outputs,
thermal management processor, 6-Layer Glass Epoxy PC Board; combining to create
a high-end sound quality without the bulky heat sinks required by most amps in
this power class.

Power Management Processor: The multi-stage Power Management
Processor continuously monitors component temperatures throughout the amplifier
and decreases power output if anything gets too hot. When playing music under heavy
loads for long periods, the circuit automatically reduces power output slightly
at first, and then further in a second stage if necessary. This two stage approach
provides an interruption free listening experience.

CEA 2006 Compliant: The MRX-M240's power ratings are measured
according to the Consumer Electronics Association CEA-2006 standards. These standards
allow you to accurately compare the rated power output of all CEA 2006-compliant
amplifiers, even different brands. Manufacturers who adhere to the standards can
display the CEA 2006 logo on their products and packaging. The power output is
measured from 20 Hz to 400 Hz using a 14.4 volt power supply with no more than
0.01% THD+N:

4-ohm: 1500 watts

2-ohm: 2400 watts

1-ohm: 1000 watts

Signal-to-Noise: When measured under CEA-2006 conditions
(reference 1 watt into a 4-ohm load) the signal to noise ratio is 82 dBA.
Measured at the rated power output S/N is 108 dB.

Verification Certificate: The amplifier comes with a certificate
that lists the RMS power output measured from that specific amplifier. It also lists
the model number, serial number, test date, and the test conditions (voltage and
impedance).

Auto Turn On: When using the speaker level inputs the X-Power
amplifiers automatically turn on when voltage is detected on the signal inputs,
making them an easy factory system upgrade.

LED: The top panel LED power indicator glows blue when the
amplifier is turned on.

Controls

Gain: The MRX-M240's gain is set according
to the level of the incoming signal. The line-level input gain setting is
continuously variable from 100 mV to 4.0V; the speaker-level input gain setting
is continuously variable from 250 mV to 10.0V.

Crossover: The low-pass crossover point is continuously
variable from 50 to 400 Hz and the slope is 24 dB/oct; the crossover cannot be
bypassed.

Subsonic Filter: The amp also has a 24 dB/oct
subsonic filter, continuously variable from 5 to 30 Hz.

Bass EQ: Bass boost can be applied to the subwoofer output;
it's variable from 0 to +12 dB with a variable center frequency of 30-80Hz.

Connections

Power/Ground/Remote: The MRX-M240 features set-screw terminals
for the Power, Ground and Remote Turn-on inputs. The Power and Ground terminals
will accommodate up to 1/0 gauge wire, and the Remote
Turn-on terminal will accept up to 8 gauge wire.

Speaker Output: The speaker outputs terminal is also
set-screw terminals and will accept up to 8 gauge wire.

Line Input/Output: Line level RCA is the preferred input
connection. The full range stereo line output allows easily adding another amp
without running a second set of cables.

Speaker Level Input: Use the included speaker level input
harnesses if the connected radio has no preamp outputs.

Fuses: The amp is protected by a chassis-mounted 175-amp
Mega fuse.

Remote Bass Control (optional): Alpine's
RUXKNOB wired remote (sold separately), connects to the amp's RJ-25 Remote
Bass Control jack, and offers control of the subwoofer output level from the
front of your vehicle. The linear attenuation can be adjusted from 0 to -20dB.

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Alpine MRX-M240

Honestly I think everyone knows that Alpine makes awesome amplifiers. I have a Cadillac STS with (2) Orion 12" HCCA Competition dual 4 ohm 2000 watt RMS 4000 watt peak subwoofers each with their own MRX-M240 running at 2 ohms at the moment. I also have had them pound many other different subs out there, but when you see these speakers with their 445 ounce magnets being easily powered by these amps I am sure it would make you a believer! One certificate rates the amp at 2760 watts at 2 ohms and the other amp's certificate tested in at 2956 watts at 2 ohms. I mean these speakers are literally almost 70lbs each and absolutely demand and need a ton of power to perform and these amps do it with ease. I have 100% confidence these amps can power any sub out there. So if you want real, serious power here you go....for a very good price. Honestly I can't imagine having any more power as I have yet to meet someone that can actually crank this system and actually endure it for more than a couple minutes because of the extreme pain in your ears- so do you really need any more power? I think that basically sums it up, this amp is POWERFUL and can do the job.

best ive ever had

Written By mrboombastic, ventura California on Saturday, September 29, 2012

I have the alpine mrx m240 paired with two alpine type X's that 3000 watts each ...if your looking for something that handle any subs you throw at it ..this is the amp there is so much power that i fear to turn it up all the way it makes you feel like your in a tornado it really gets your blood pumping if you have the money spend it you won't be disappointed